Optical glass and optical element

Abstract

The invention discloses an optical glass, comprising the following components: 40wt%-55wt% of SiO2, 5wt%-20wt% of B2O3, 13wt%-25wt% of Nb2O5, 3wt%-20wt% of R2O, 0-5wt% of WO3, 0-10wt% of ZrO2, 0-5wt% of BaO, and 0-0.5wt% of Sb2O3, wherein the R2O includes one or a plurality of components selected from a group of Na2O, K2O and Li2O. The optical glass provided by the invention does not need to be added with non-green elements. Experiment results show that the optical glass provided by the invention has a refractive index of 1.59-1.63, an abbe number of 42-47, which satisfies requirements of modern imaging equipment.

Description

technical field [0001] The invention relates to the technical field of glass, more specifically, to an optical glass and an optical element. Background technique [0002] Optical glass is a glass material used to manufacture lenses, prisms, mirrors and windows in optical instruments or mechanical systems. Optical glass has good light transmission performance and high refractive index, and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, digital cameras, telescopes, microscopes and lenses. In recent years, with the increasing popularity of digital cameras and digital video cameras, not only the demand for optical glass continues to expand, but also higher requirements are placed on the performance of optical glass. For example, in order to satisfy the performance of the apochromatic and super-apochromatic optical systems, the residual chromatic aberration of the optical system is required to be small in a wide wavelength range. [...

AI Technical Summary

Problems solved by technology

However, due to the content of more than 45wt% B 2 o 3 The chemical stability of the glass is poor. In addition, in order to obtain ideal optical constants and quality, the Pb element, which is very harmful to the environment, is introduced to form a non-environmentally friendly optical glass.

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